updated 11/19/2012 AT 8:00 AM ET
•originally published 11/19/2012 AT 9:05 AM ET
After spending a week in the hospital for a “tune up,” Robin Roberts is as positive as ever.
In a message to fans, the Good Morning America host, 51, says she’s back at home after being treated for a latent virus that had not responded to medication.
Roberts, who had undergone breast cancer treatment five years ago, was diagnosed this year with a rare blood disorder, myelodysplastic syndrome.